I am naturally blonde, but would like to dye it dark. Blonde is boring after having it for 19 years. But I'm worried it won't look good, and I won't be able to get my natural color back for a longtime,
I would say it depends on what color eyes you have. If you have blue eye or green eyes having dark hair would make them stand out more. But don't do anything too rash because as you say it won't grow back for a long time. As someone else said try looking at yourself in a wig first or using that temporary dye.